Many CPUs slow down as they get hot.
Try a nice laptop cooling pad next time.
Whenever I begin to play a game on my laptop, any downloaded game, my laptop will begin to act very strangely. About 30-40 minutes into playing the game, the laptop will abruptly and very violently begin to whir its fan and simultaneously begin to lag, drastically lowering the laptop's performance and becomes impossible to enjoy the game. This lag occurs in "intervals". After about 10 minutes after the initial lag, the laptop quiets down again, and performance returns to normal. And about 10-15 minutes later, the lag will return again as well as the fan whir, usually with worse lag than before.
My computer is a Dell Inspiron 1501
processor: AMD Turion 64
memory: 1406 RAM
chip: ATI Radeon Xpress Series
If anyone knows the solution/what the problem is, I would be very grateful. Thanks in advance.